<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table {
            width: 810;
            margin: 100px auto;
            text-align: center;
            border-collapse: collapse;
            font-size: 14px;
        }

        thead {
            margin: 0 auto;
        }

        thead tr {
            height: 30px;
            background-color: skyblue;
        }

        tbody tr {
            height: 30px;
            margin: 0 auto;
        }

        tbody td {
            border-bottom: 1px solid #d7d7d7;
            font-size: 12px;
            color: blue;
        }

        .sg {
            background-color: pink;
        }
    </style>
</head>

<body>
    <table>
        <thead>
            <tr>
                <th>代码</th>
                <th>名称</th>
                <th>最新公布净值</th>
                <th>累计净值</th>
                <th>前单位名称</th>
                <th>净值增长率</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>003567</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.325</td>
                <td>1.123</td>
                <td>1.083</td>
            </tr>
            <tr>
                <td>003567</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.325</td>
                <td>1.123</td>
                <td>1.083</td>
            </tr>
            <tr>
                <td>003567</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.325</td>
                <td>1.123</td>
                <td>1.083</td>
            </tr>
            <tr>
                <td>003567</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.325</td>
                <td>1.123</td>
                <td>1.083</td>
            </tr>
            <tr>
                <td>003567</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.325</td>
                <td>1.123</td>
                <td>1.083</td>
            </tr>
        </tbody>
    </table>
    <script>
        var tbody = document.querySelector('tbody').querySelectorAll('tr')
        for(var i = 0 ; i < tbody.length; i++) {
            tbody[i].onmouseover = function() {
                this.className = 'sg'
            }
            tbody[i].onmouseout = function() {
                this.className = ''
            }
        }
    </script>
</body>

</html>